Antenna



FIG. 1 is a perspective view of an antenna showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings depict portions of the antenna that form no part of the claimed design. 

CLAIM We claim the ornamental design for the antenna, as shown and described. 